Walmer E. Strope, "An Introduction to Disaster Psychology", U.S. Naval Radiological Defense Laboratory, report submitted and published on the record of testimony to the 1956 U.S. Congressional Hearings on "Civil Defense for National Survival".  Additional relevant reports are appended.

UPDATE (25 AUGUST 2016)

I have added also, as a separate PDF upload, Walmer E. Strope's brilliant classic secret 1948 report deriving the CROSSROADS BAKER underwater nuclear test fallout and base surge dose patterns from the raw data (dose rate meters, film badge doses and films of the fallout plumes being deposited on the various ships or passing by them), INVESTIGATION OF GAMMA RADIATION HAZARDS INCIDENT TO AN UNDERWATER ATOMIC EXPLOSION, U.S. Defense Nuclear Agency document DNA-6032F-C.8.4 and NNSA/NSO Nuclear Testing Archive report NV0048674. This 110 pages report was kindly scanned and emailed to me by Nevada NNSA.

Although the fallout dose rate pattern for 1 hour after burst extracted from this report has been published before, the detailed information in it is vital to determining accurately the accumulated doses which depend on the arrival times of the fallout. Strope discusses how he researched the report in his recent autobiography, "Autobiography of a Nerd". Fallout arrival times and integrated doses are vital for determining the ability to evacuate or shelter from the fallout in a terrorist event. I have included the relevant chapter from Strope explaining this in detail, which is of great interest to those who want to know the background.

Walmer E. (Jerry) Strope's Autobiography of a Nerd

1 Growing Up in North Park

2 Coming of Age in Grand Rapids

3 New York, New York

4 The Webb Experience

5 They Also Served

6 The Real Crossroads

7 Go West, Young Man

8 The Nerd in NRDL

9 Getting Out The Word

10 The Little Red Worcester and the YAG

11 The Unfortunate Dragon

12 The Theory of Survival

13 The Fabulous Fifties

14 The Ultimate Shelter Test

15 Nukes I Have Known

16 Shelter from the Storm

17 The Call in the Night

18 Life on the E-Ring

19 The CD Research Surge

20 The Yellow Peril

21 The Hébert Hearings

22 Theory of Survival, Part II

23 The Five-City Study

24 Flambeau and Other Field Tests

25 Movement to Shelter

26 Crisis Relocation

27 Retirement Number One

28 Northeast Corridor

29 Rapid Expansion Plan A

30 Nuclear Safety

31 Retirement Number Two

32 The Nerd Looks Back

Chapter 6
At The Crossroads (pages 79-92):

"We met at Union Station on the cold gray Sunday morning of April 28, 1946, more or less prepared to ride the train across the country to San Francisco, where we would board the USS Wharton for the voyage to Bikini Atoll in the south Pacific. In addition to myself, there were the staff of the Ship Protection Section of Preliminary Design: LTC Dave Savaker, Henry Cochrane, Woody Armstrong, Charlie Ksanda, and Ken Lovell. With us were engineers and technicians from other parts of Buships, mostly strangers whom we would get to know well in the next six months. Forty or fifty strong, the Buships contingent to Operation Crossroads left Washington knowing little of what was to come. ...

"... During the spring of 1947, some of the results of the radiological measurements on the ships at Bikini began to come in. ... . I laid out a plot of the target array on my drafting board and began to plot the raw measurement data. I wasn’t quite sure what I was looking for but I knew what it was when I found it. Some of the ships showed higher readings than ships closer in to the burst. This should not have occurred if the base surge was the contaminating mechanism. I called the anomaly to Muddy’s attention. After some discussion, we decided to pursue the matter further. We needed the film badge data from the target ships, which would give us the total radiation exposure to compare with the contamination measurements. The film badge data for some reason were Top Secret. So we applied for a Top Secret clearance. Meanwhile, I began to refine the contamination data by adjusting to a common measurement time. ...

"All that summer I worked on the contamination patterns from the Crossroads underwater shot. I obtained dozens of photographs of the event: the luminous bulge, the white stem of water rising, the cauliflower cloud forming, the base surge at the foot of the collapsing column and the pendulous plumes dropping down from the cloud onto the ships in the target array. Some amateur photogrammetry proved that the location of these plumes matched the areas of high contamination measurements. I was convinced that most of the contamination came from the cloud fallout and not from the base surge. (I liked the word ‘fallout’ and was one of the first to use it.) ... Labor Day 1947 came and went. The Top Secret clearance seemed bogged down somewhere. Finally it arrived on the third of October. I requested the film badge data. ... The film badge data arrived. It confirmed my analysis of the contamination measurements. Moreover, by analyzing those target ships that were not under a fallout plume but were enveloped by the
base surge, I concluded that over 90 percent of the radioactivity had come from cloud fallout and less than 10 percent from the base surge. We put the report to bed in January of 1948 and it was distributed as a Bureau of Ships classified report in March of that year. It bore one of my typical grandiose titles: Investigation of the Gamma Radiation Hazard Incident to an Underwater Atomic Explosion."

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